Floyd Mayweather has continuously teased participating in a mixed martial arts fight, regularly suggesting he would take on McGregor in a rematch or set a bout with Khabib Nurmagomedov. Though many took Mayweather's MMA aspirations as a bluff, it looks like he may actually back up his talk just not UFC competition. Mayweather announced at a Sunday night press conference that he will compete for RIZIN Fighting Federation in a bout against Tenshin Nasukawa, an undefeated kickboxer. Posted By Persist